Environmentally Acceptable Alternatives to SF6
National Grid Electricity System Operator
National Grid TO Innovation Team
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Innovation Funding Incentive
Gas Transmission Networks
Sulphur hexafluoride (SF6) is widely used in electric power transmission
equipment on account of its excellent properties both as an insulating material
and as an arc-interrupting medium. It has become the only commercially
available technology for circuit-breakers at transmission voltages. However, it
has a high global warming potential approximately 23,000 times that of CO2,
and its use raises concerns on environmental grounds.
Against this background, it is essential that the electricity supply industry
should actively consider environmentally more compatible alternatives to SF6.
The proposed work is intended to allow National Grid to identify and evaluate
candidate alternative technologies to SF6 for further development, to drive
improvements in containment of SF6 in equipment, to maintain an awareness
of research and development into potential alternatives to SF6 and to
collaborate where appropriate.
The key objective of the proposed work is to enable National Grid to achieve
the targets set out in its Climate change Strategy by means of the following:
- To identify environmentally acceptable alternatives to SF6 gas
- To participate in collaborative efforts to develop alternatives to SF6